Christopher Casey, 56, of Upper Moreland, Pennsylvania, was sentenced to 11.5 to 23 months in county jail and three years' probation after pleading guilty to involuntary manslaughter and possession of an instrument of crime. The sentencing follows the fatal stabbing of his neighbor, 62-year-old Robert Wallace, during a dispute over Casey's loud snoring. Originally charged with third-degree murder, Casey's plea deal reduced the charge. The altercation occurred after Wallace pushed in Casey's window and threatened to kill him. Casey's defense attorney argued that Casey, who has autism, was not equipped to handle the sustained abuse and threats from Wallace. Casey apologized to Wallace's relatives in court, describing the incident as 'unfortunate.'